Combined typewriting and computing machine



F. A. HART. COMBINED TYPEWRIHNG AND coMPurlNG MACHINE.

APPLICATION FILED OCT. I6, IBIS.

Patented June 21, 1921.

8 SHEETS-SHEET l.

mvmow MMM BY M u ,IM Yllfllrlllllllflllrfl WlTN ESSESz F. A. HART.

COMBINED TYPEwmTlNG AND cuMPuTlNG MAcHmE.

APPucAloN FILED ocr. is. 1916.

Patented June 21, 1921.

INVENTOR'- mww WITNESSES:

ATTORNEY.

F. A. HARY.

COMBINED TYPEWIIIIING AND COMPUTING MACHINE.

APFLCNON LED OCT. |5| QIG. 1,382.286. Patented June 21, 1921.

E SHETS-SHEET 3.

'lllllllllll'lll TFEWL INviNTow F. A. HART.

commEn YPEwRmNG AND COMPUTING MAcHlNE.

APILICATION FILED OCTA 16, l9l6.

Patented June 21, 1921.

8 SHEES-SHEU 4.

F. A. HART. COMBINED TYPEWRITING AND COMPUTING MACHINE.

- APPLICATION FILD 0CT.I6.19\6.

1 L 1 n l WITNESSES YC lffmp APPLICATION FILED OCT. l6, |916.

Patented June 21, 1921.

8 SHEETS-SHEET 6.

,.,......,........H...... f EN hhx. 4, L w 252mm@ bw ww SN w F. A. HART. COMBINED TYPEWRITING AND COMPUTING MACHINE.

E SHEETS-SHEET I.

Patented June 21 APPLICATION FILED OCT. i6. ISIS.

INVENTORz BY SPN@ ATToR Y.Y

Q ww.

www MSN F. A. HARI. COMBINED TYPEwmnNG ANU cnmPulNG MACHNE.

APVLICAYION ILED OCT. I6. 19H3.

UNITED STATE-S 4PATENT OFFlCE.

FREDERICK A. HART, OF NEWARK, NEW JERSEY, ASSIGNOR T0 UNDERWOOD COM- PUTING MACHINE COMPANY, 0F NEW YORK, N. Y A CORPORATION 0F NEW YORK.

COMBINED TYPEWRITING AND COMPUTING MACHINE.

Specification of Letters Patent. y Patented June 21, 1921.

Application led October 16,1916.V Serial No. 125,877.

To all 'ur/wm it 'may concern:

Be it known that I, FREDERICK A. HART, a citizen of the United Statesresidin in Newark, in the county of Essex and tate oi New Jersey, havelinvented certain new and vuseiul. Improvements in Combined T'vpen'riting and Computing Machines, of `which thefollowin is a specification.

My invention re atesto computing machines, and is herein disclosed as applied to an Underwood-Hanson combined typewriting and computing machine in which the numeral keys ofthe typewriter set up numbers on computation members which are subsequently carried into dial wheels to exhibit the results of the computation, and is an improvement on Amy co-pending application, Serial No. 72,015, filed Januar 14, 1916.

My invention is designed to be used with computing machines in which there are a plurality of totalizers, there being seven totalizers herein ndisclosed and mechanism provided to control the state of s aid totalizers so that they may be caused to add, subtract or remain neutral during the operation of the machine, said State being controlled to conform to the required rtype of computation in conjunctionwith typewriting done on specific bookkee ing forms or work-sheets herein-disclosed. he machine, however, is not confined to any partioularnumber of totalizer or to any number of bookkeeping forms and may be adapted to perform a gri-at variety of work of the nature hereindisclosed.

lt has been found that in the hands of the :n'i'linaiy operative or typist the separate setting; of the connections to the Vdiiferent totalizers are troublesome, because they involve the setting of unfamiliar mechanical combinations, and therefore the setting of such paris is disconcerting to the average person into whose hands such a machine is likely to he placed for use. Moreover, in the hands of an expert operative skilled in the art'of setting up machines of this character, said setting up will be troublesome and time-consuming in a machine in which there are a large number of totalizers and in which a. variety of bookkeeping forms, for which the machine may have to be set up at frequent intervals, are used.

My invention simplifies the setting up of the machine to correspond tothe various bookkeeping forms which may be used thereon, tojsuchan extent that .the ordinary typist may set the ymachine-quickly and with certainty. Forthis'purpose Ihave provided ',two slidably ymounted superposed bars or plates at the rear of the typewriterrcarriage andzmovingtherewith, said plates bein'g adaptedvwhen Vmoved relatively to each other and relativelyV to the 'typewriter carriage -to'control the denominational-selecting kmechanism -so thap ythe typewriter carriage inV moving in lletter-feed direction will automatically selectthe specifictotalizer or totalizers -in whichicomputation is to be performed during -the'r writing-of numbers in -a column 'on sald bookkeepingforms, and said typewriter carriage will also automatically control 'the'state of`thef-.totalizers in which computation is being performed.

I have found it advanta eous vto provide a i finger-piece, on each 'of said t slidablymounted superposed bars, placed in proximity to each other and held apart by a spring so that when said finger-pieces are pressed toward each other bythe operative said bars will Vbe unlocked from the typewriter carria e and moved relatively to each other, in which position said bars may be moved in unison relative tothe typewriter carriage with the result that in oneposition said bars will make certain denomination selectors effective or ineffective and in another position said selectors may be effective in an entirely different manner, so that either the same denomination selectors or some of them may be madeefective where they were ineffective before, and vice versa, or other Selectors may bc made effective or ineffective.

l have also found it advantageous to provide a gage for the purpose of positioning the various Work-sheets or bookkeeping forms; said gage being slidably mounted on the typewriter carriage paper table, and settable to a scale corresponding to the scales provided on said slidably-mounted superposed bars, so that said work-sheets may be properly placedin the machine, and so that when vnumbers are written in predetermined zones marked on said work-sheets, that portion of the denominational selecting mechanism which if.' nttiiohorl to tho typewriter curriugo will cor-uct with denominational rnombnrs ).rhircml nt thv. rcnr ol Lho Inuohino Corron SponclingA to thc clonon'iination of thu digit written in Suhl zone or ':nlnn'in on tho workY slinl..

Other Ioaturos und inaftcr nppozir. A

In tho accompanying drawings,

Figure 1. is ir sootionnliside View largely dinfgminn'iutic taken iibout on the line l-'l, of Fig. 6, of n.11 UnderwoodHnnson*com binerl typewriter and Computing machine showing' inentio'n .asfinp' lied thereto.

2 is' nj detail View of t :it part of' the denomintio'niil gselocting levi'ce whichy is attached tolthe typowriter qarringe showing ftl1 `e dogs in`-`normol position.

Fig. 3 is u'soctional `View of the parts sho'Wnin Fig. 2, taken on thc'line 3 3 of inl'vuntogcs will hereY lig. 4 i'syzr` sectional view --Sirnihlr to'Fig. 3,' showing a denominational selecting dog i'nine'ffeotive position. l

Fig. 5 is "setionl pl-iinrview 'showing Sonie of 'the totlizfrs 4und a 'portion 'ofthe 4indexing mecha-mism, denominational Vsleotinf mechanism, 'and' trunig'position device.

Fig. 6 i'a 'fragmentary diagrammatic fiw 'o'f portion ofthe-machine. 2- Figi? fiS a diagrammatic'f 'sectional =sicle tjieifvlo'f "themsiliine taken o n the line's 7--7 'of yl6;`- sl10Wing the' drivingineshxnism and some of the connections thereto.

' I Ti-g is @perspective view of some of tho pajrts shown in FigJT-loolci-ngin tho'oppositc direction.

Fig. 9 is n fragmentary geotionfi'l fo plan dotniiview-taken 4on tlio line 9 9 of llig. 1, of the mechanism for 'holding-the subtractionfsetting bnr in :actuated position, the parts beingshown in 'normal ineffective p0- Ston.

*Eiga 10 -isfL-i Yplnn View 'similar tn Fig. 9.

'showing the parts movdto' effective position.

Fig. 11 is n i:rn{,g'rman'tarx1 enlarged detil View of the lcftlmncl enfl of the denominational controlling bars.

Fig. 12 is n fragmentary perspcotivp: View looking ionarclthe rear. of the nltsshown in Fig. 11 and some ol the nd1acex1t'parts nf the machine.

Fig. 13 isa sectionzll view tnlmn on tho lines 13- 13 of Figs. 1 a.nf,l. (i, showing onvl set of denominiitional selecting jacks, n-m'l adjacent pArTSJlOOlCiUg from the bottom upwsirdly.

Fig. 14 is a detail perspective view of thc partsfshown in Fig. 13. A

Fig. 1 5 is 'a'.rnctional view'of a work- .'#heet :which "may be used in the machine.

'shoot sli'o'i l'igf. li is :i Svntionnl lolnil vicw Showing ihnfinmchzlnimr whm'ohy thodonoininntionn| (lugziconlrollingV hars nro locked to lha typoxrl'ilr mii-iugm Lo more in unison thermiiith. i Fig. 18 is nidotnl pmtSPCCtiv-oriw ol the loc-lling` latchI Shown in Figs. ,i7 und 2U.

Vig. 19 is :i roar view of Vtho mmlninifsrn Hliown'in Figul?. i

Fig. 9.0 is. n View Similar lo Fig. I7 :inrl (nlwn on tho lino 20m2() of Figt ll, showing thv denominational dog-controlling' plains and t'lio 'l'nlxzhinfaitun toil position.

Fig. 21 is n fractional plunviow. largely dingi'animntic. slibj'fiiig the. typewriter Car ringo, the iiiiii-ifngo thoro. smother form of rorlceheetl theron 4und l'ltlho donorninn 'tional flfiglintiolling'burs 'iintl paper gage lUr'i purpose there are mounted yonthe typewriter carriage dogs 44 (Fig's.'1,2 and 3), on each of which is pivotally mounted one or more tappcts 45 adapted to depress serz'atm the rear ends of jacks 46 pivotally mounted in heads or casings 47 fast to the framework of the machine; The dogs 44 are adjustably mounted on a bar, 48 at the rear of the typewriter carriage, a rack 49 beinglprovided to locate and hold said dogs in the desired position. The jacks 46 are provided on their forwardends with cams 50 (Figs. 1, 6 and 13)` placed 'in the path of said tappets 45, so that the latter will actuat ysaid jacks as the typewriter moves into a computin zone, beginning with the 'jack corresponding to highest denomination, andso'fon'to the jack corresponding to units or;lo'west denomination. Thelrear ends of said jacks are adapted to depress vertically disposed links 51 mounted at the rear of'themachine, the lower ends ofswhich areI connected to levers 52 which actuate transposition linkages 53 to 'move forwardly* pin-bearing .bars 54 (Figs. 1 and 5) in a manner illustrated and described in the pending application of Ogden Minton, SerialzNo. 797,714, filed October 28, 1913;"(n0w Patent No. 1280,065, of September 24,1918) so that the pinbearing bar on the extreme left will be moved forwardly at the actuation of the jack 46 mounted on*tl1'e.1extre1iae` right. In other words, Vthe jacks 46 and pin-bearing bar 54 of corresponding denomination are actuated simultaneously.' "ur' y Each bar 54 is'providedfwith nine index pins 55, one for each digit from 1 to 9, which, when said bar 54 is v'moved forwardly, are moved into juxtaposition with the lower reaches 56 of an indexing linkage mechanism 57 adapted to be actuated at the-depression of any numeral key from 1 to 9 to depress one of the pins 55 corresponding to the value of the numeral key actuated.

For this urpose, each numeral key 30 is provided with af-pendant 58, the lower end of which, when said numeral key is depressed, is moved into engagement with and actuates an arm 59 mounted on the forward end of a rock shaft 60. `The rock shafts 60, there being one provided for each numeral key from 1 to 9, have fast thereon arms 61 (Figs. 1 to 5), the upper ends of which engage and actuate at each numeral key stroke linkages 62 connected to arms 63 fastA on rock shafts 64, said arms 63 being connected at their lower ends to linkages 65 which when actuated cause a depression, by means of bell cranks (not shown herein), of the linkages 56 at the downstroke of the numeral key to depress the index pin 5,5 which had been moved into effective position by the tappet 45and connected mechanism Said pin-setting linkage mechanism is described and illustrated in the pending application of Richard M. Becker, Serial No. 782,307, liled July 3l, 1913 (now Patent No. 1,296,354, of March 4, 1919).

It will be Seen as each bar 54 corresponding to the denomination in which printing is done on the work-sheet is moved into effective position and as each numeral key is depressed, the number written on the Worksheet will be indexed on the nest of pins 55 in such a manner that pins will be depressed on those rack bars corresponding to the denomination in which typewriting had been performed and the one pin on each rack bar will be depressed which corresponds to the digit printed in a corresponding` denomination of the number. The digits from 1 to 9 only are indexed since no index pin 55 is depressed when the zero numeral key is actuated as in said application of Becker.

' In order that the numbers thus indexed may be exhibited on the dial wheels of the adding heads, each rack bar 54 (Figs. 1 and 5). is'provided with raul; teeth 70 at its forward end and meshes with a pinion 71 connected to each dial wheel by means of the usual 'Underwood-Hanson one-way pawland-ratchet mechanism (not shown herein), so that when said rack bars aremoved forwardly by means of a general operator cross bar 7 2, in a manner to be presently described, the dial wheels will be rotated in a clockwise direction, as seen in Fig. l, amounts directly proportional to the value of the index pins depressed to exhibit the result of the addition at a sight opening 73 formed in the casing of the machine.

To move said general operator cross bar 72 forwardly so that'its forward edge may engage the depressed index pins 55 and move therewith the rack bars 54, the machine may be provided with the usual handle 74 (Fig.` 1) fast to a'rock shaft 75. on which is mounted a pair of gear segments 76 meshing with 'idle pinions 77. which` in turn` mesh with rack bars 7 8 of a general operator framework 79,' on which is mounted the common cross bar 72 extending across the machine directly beneath all ot the pin-bearing rack bars 54. The parts areso arranged and proportioned that at the forward stroke of the reciprocation of the handle 74. the cross bar ,72 will be moved forwardly and therewith allthe rack hars upou which pins 55 have been depressed@ A\ t the return stroke of the handle 74. thc cross har 72 will be moved rearwardly and the rear end thereof will engage lugs 80. formed on the rack liars 54. to return to normal position all of said rack bars which have been moved forwardlv in a computation.

ln the machine herein illustrated. it is advantageous to reciprocate the general operafor 79 b v the power of an electric motor 81 (Figs. 6 and 7),. Connection between the general operator and the driving mechanism of the motor may be effected either manually or automatically by the actuation of a key or by the movement of the typewriter carriage, respectively.

To actuate the general operator 79 at the will of the operative through the intermediary of the motor 8l, there is provided on the machine a key 82 (Figs. G; 7 and 8), which, when depressed, rocks 'a lever 83 against the tension of a leaf spring 84 to raise a latch 85, to release a clutch member 86 of. a ball clutch 87, so vas to connect the normally stationary shaft 88 with a constantly rotating member 89 driven through a worm-gear 90 by the motor 81 in a manner illustrated and described in my cci-pending application, Serial N o. 569,451, filed Decem ber 9, 1910 (now Patent Np. 1,211,148, of January 1917).. The shaft 88 is connected to a reciprocating member 91 (Fig. 1), which erigages ay'oke 92 fast on the general operator framework' 79, so that when the latch 85 is raised, the reciprocating member or arm 91' can-be moved forwardly and rearwardly, reciprocating therewith the general operator and' allV the rack bars 54 upon which pins have' been depressed.

It is advantageous to trip the reciprocatin'grmechanism: of the general operator'autoL matically by the travel of the typewriter carriage, at the completion of the indexing of the number to be computed as the typewriter carriage travels one letter-space beyond theposition in which printing is done in' unitsv denomination.

For this purpose there 'is-provided at the left of each units jack 46, a jack 93 (Figs. 6. 13 and 14) similar in construction to the jacks 46 and having a cam 94 formed thereon, spa-ced at less than one letter-space toward the left of tlie units jack, so that the ta-ppet4 45 will pass into and out of engagement with the cam 94 and so that the jack 93 may1 lie returned to normal position at the end of said letter-space movement of the typewriter carriage 36 and the tappet 45 connected thereto.

As thetypewriter carriage moves through said one letter-space distance after the printing and indexing of units, tho tappet 45 in passing' under the cam 94. will actuate the jack 93 so that the rear end theieof will depress the'link 95 (Figs. 1 and 6), similar in construction to the links 51. to depress an arm' 96 of a bell crank pivoted at 97 to swing an upright arm 98 thereof in a clockwise direction, as seen in Fig. 6, to move right- Wardly a slide 99 (Figs. 1, 6 and 8), to releasean arm 100 connected by a pin-andslot connection 101A to a rock shaft 102, so that at the release'of said' arm 100, a spring 103; tensioned and attached thereto. will swing the arm 104 downwardly' to depress th'e key 82 which, through the intermediary of itsconnections with the latch 85, will trip i ,sea ,Tiss

the ballv clutch mechanism 87 to reciprocate the general operator in the same manner as when said key 82 had been depressed manually, hereinbefore-described.l The construction and action ofthe automatic motorstarting devices, herein-described, are similai` in construction and action-to the similar mechanism-illustrated and described in the pendin application of John-f, N. Thornton, Seriali 0.769,132, filed May 22, 1913 (now Patent- No; 1,283,360, of October 29, 1918).

I-n the invention herein-disclosed, each set of jacks provided with a motor trip jack'93 placed relatively tothe jacks 46, as herein described. It will be see'n from the fore 'ing-that after every number written in t efcomputingzone sindexedupon the computing mechanism, the neral f operator 79 will be au'tmfnaticalllv f reclprocated to run said= number int'o\th14 Aiai VWheels 69', either in' addition or subtraction, according to the type of computation determined i by the state-controlling mechanism, mounted on the rear ofthe' typewriter carriage, to be, hereinafter deaol'lied;`

As' herebefore-'descri'bedpeach dial wheel 69 is rotated idigiis distncerdrectly proportional to' the? -val'e of' the' diglit indexed on itsfaoeiatendex' bar 54 `at t e forward stroke of the' g'eneral'operatr 79. When any of the diahwheelsare rotated an amount so that the niinieral'ifl thereon, passesthe sight f opening- E73 in the performance ,ofaddition, `it is rdesirable'to'rotate the dial' wheel of next higher denomination oie=digits distance in addition` tot thero'tation imparted thereto' b v the rack' han 54.v `For this purpose, each dial wheel isprovided witha carryover tooth 110,50' placed thereon, as to impart apartalarotation to a carry-over pinion 111,as the dial Wheel moves from 9 to 0. so 'as to move the Vteeth of saidcarryover pinion 1'11 into' meshing relation with the associated o'neo a series of spiral sectors' 112. 'Said sectors 112`y are mounted on a shaft 113y (Fig 1), atthe en'dfofwhich is a pinion 114-, connected theretorb'y a oneway ball clutch (not shown herein); said pinion 11-4meshng with idle Apinion 115, which isiconstantlyinlmes'h withthe rack 78 of the general operator 79. The ball clutch of the pinion 114 is so arranged that said pinion will rotate idly relative to the shaft 113. during the forward stroke of the generalY operator, but will rotate saidshaftV 113 therewith during the return stroke of the general operator, and Will rotate therewith the sectorsI 112 to complete the rotation of those of the carry-over pinions 111, theV rotation of whichy had previously been initiated by a carry-over toothl 110 of the associated dial wheel. Each-pinion 111 has fast thereto athree-point-pinion 117 adapted to engage and rotate a pinon 118 fast to the dial wheel ofA next higher denomination to lll) rotatel the latter one digits distance at the lcompletion ofthe .carry-over action `ofthe carry-over pinion 111. 4It will be noted that the carry-over mechanism, herein-described, is substantially thesame as that illustrated and described in the patent frantedtonl-Ians Hansoinno. 816,319, dadiiamnaaieo. AAfter the numbers indexed upon tliepins have been run into thetlitalizers4 and before a subsequent computation may beperformed, it is desirable to restore-allthe desA pressed index pins to theirnormal position.

For this purpose,-there.is provided pinrestoring plate 119 (Fig. 1),;1for each set of rack bars 54, which is normally 'outof the path of the depressed index pins 55 and general operator'cross-bar 72 and which is moved upwardly against the underiside oiwall the rack bars 54 when the'latter reaehtheir nor mal returnf position. i 'To wctuate. -Said pinrestorine plate, there is-provideion the general operator frame 79, a pawl 120fwhich-,- at the forward stroke of-thegeneral operator. passes idly an farm 121 fixedtoa rock. shaft 122` on which is fixed a pluralityi'of rearwardly extending arms' 123, one for earlr pin-restoring' plate 119 andunderlying Ethe latter. Near the end of the rearward Ireturn, .stroke of the general opel'atO1"-79ithe.pawl

120 thereon will engage the under Side ofthe arm 121 to rock the shaft 122 and therewith the arms 123 to more upwardlythe pin-re storing-plate 119 into contact with the lower edge of all the pin-bearing bars'et to move upwardly said index -pins 55. said pins being sldably moiuited on said barsfo'utof the path of the `general operator cross-bar 72,50 that at the subsequent reeiprocation of; the cross-har T2 only those pins which hadv been depressed iu a subsequent computation will be engaged thereby. It will be notecLby reference to Fig. 1. that the pin-restoring plate 119 is mountedon bell cranks connect ed bv links and is actuated in a manner simila r to that illustrated in said Hanson patent.

lt will he noted that at the return to normal position of the general operator. the parts of the mechanism which return to their normal position include the index'pins. piu-restoring plato. carer-over mechanism. pin-bearing' hars. `f fcneral operator, drivin;r mechanism and motor-trip mechanism. It will also be noted that an automatic subtraction mechanism. to he presently described. isalso retin-ned to its normal position at the same time. Y.

When some of the totalizers are being actu.- ated in the performance of additiom it is advantageous at times to simultaneously actuato others of the totalizers for subtraction or urinate subir-actively allof the totalizers in which it is desired to'compute-a't aftime, 'for which purpose,.eaelrofv'the totalizers is provided with manual and with automatic sub-l traction-setting means.

g In .the machinehereimdisclosed, the cornplemental Ymethod of substraction is employed using favas a base, an additional unitbeing added on the dial wheel `ofilowest denomination;This method of subtraction.

is common to many Underwood-Hanson computingniachincs and.,is.disclosed in the ap plication of Hans Hansomserial No. 626,550, iledeMay 11i-.191,41 (nowilz'atent No. 1,278,812, ofieptember 10,1918);

To ,manually set themachine for subtrae tion .thereis provided. akey 126 slidably mountediingthe frontf ortion of the frameworkf the machine ig. l),` and pivotally mountedat its rear en -on an arm 127 fast on a. hub-128 (Figs. 6 and `8), which is loosely mounted onthe rockshaft 102. "When it is desired to setthe totalizer of the machine for subtraction, itsassociated key 126 is pressed rearwardly against-the tensionof the spring 129 torook the arin 1 21 andhub' 128 in clockwise. direction 4and .therewithwhefpawl 130 fast on4 said hub, so that the rear end of the pawlwill be.moved A out ofA anotch 131 formedina subtractionLlbar 132 (Figs. 1, a andl 6);v mounted; to. be moved .horizontally and ,rearwardly` by a normally.- tensioned spring 133 atja clockwiseactuation of said army and pawlf127,130. Ab the rearward stroke of the subtraction bar 132 it is desirable to depress all of the pins-55-correspondingto ,-9 andassooiated with the totalizer in which subtraction is to be performed. For this purpose, .said subtraction bar -132 is adapted at its' rearward stroke to actuate a trigger mechanism, comprising a bell crank 140 pivoted on said subtraction bar and engaging an arm 14lon a bail 142 common to and overlying levers connected to each of the 91 pins. During the rearward stroke ofthe subtraction bar 132, the arm 141 and bail 142 are swung in counter-clockwise direction, as seen in F ig. 1, so that the universal member of said bail engages all of the levers 143 connected to said z 9 pins todepress all of said 9 pins in this nest. .At the end of the rearward stroke of said subtraction bar the bell crank 110 will strike against a projection 144 to swing said arm inl counter-clock wise direction' about its pivot, so as to more one :1 rm thereon out of engagement with the arm 141 of said bail which will then be returned to its normal ineffective position by its spring. not shown herein1 so that said 97 pinsmay be restored to theirnormal position at the depressionof any numeral key except the 0 numeral key, and so that said pins may also be restored to their normal position by the pin-,restoring late 119 at the end of a computation. It wil 'be noted that 'the herein described subtraction-setting mechanism is disclosed in the application of Ogden Mintion,A Serial No. 797,714, tiled October 28, 1913. When subtraction is to be performed on any of the totalizers-in accordance with the lll) herein-described' complementary method of subtraction. it is advantageous to connect the numeral keys 30 in such a manner as to depress index pins 55 corresponding in value to tliec'omplements of the numbers indicated on said numeral keys, using 9 as a base.

For this purposepthe lower reaches 5G oi' thepin-setting linkage mechanism 57 are connected to the numeral keys when subtraction is to be performed in such a manner-that the reach :")G'corresponding to the complement of the value ot' the numeral key actuated will be de Jressed and therewith the corresponding in ex pin 55, thus indexingthe complenent of the number Written the work-sheet in accordance with the herein-mentioned method of subtraction.

As hereinbefore-stated, it is advantageous that Some ofthe totali-zers may perform add-'rtionlw-hile others may perform subtraction. I'n order that those members of the linkage mechanism 57 in one computing unit, which aret'o 'be used te index for subtraction, 'may be set to depresspins `correspondi'n'g'o the comp'lenienital values of the numeral keys Lactuated, simultaneously with the Vdepression in another'cor'niputing unit of index pins 55 corresponding directly to said values of saidnumeral keys for the performance of addition, there is provided on the subtraction bar 132 (ig. l), a p in 150 engagedbya bell cran-k 151, the upper arm of which-hasn-pin-andslot connection with a swinging shelf 152 pivoted to the framework ofthe'xnachine and connect-ed to all of the rock shafts 64 of a set, in such a manner that said rock shafts will be moved forwardllyllat the release of the subtraction bar 132,*as'disclosed in said application of RichardM. Becker, Serial No. 782,307, filed July 31, 1913. e

It will be noted that there is a. shelf 152 associated with each subtraction bar 132, and each of said shelves is common to all of those rock shafts G4 which' are associated with an individual totalizer. Vhen the rock shafts (i4 are moved forwardly at the release of the` subtraction bar .132, the depending arms 63 thereon Will be moved out of engagementwith the linkages 65 corresponding directly to the values of the associated numeral keys and will be moved into engagement with those of the linkages 65, respectively, corresponding to said complemental valuesof the numeral keys, said arms 63, however, retaining connection. in their forward posi-tion, with the linkages 62 and the upright arms 61, so as to maintain their relative connection with the numeral keys 30. Each rock shaft 64 has fast at the rear end thereof an arm 153 which is moved into engagement with a linkage 154 when said rock shafts are moved' to subtraction position and are adapted. at the depression of any numeral key from 1 to 9, to actuate the levers 143 pivoted' on 'the rack bars 54 to restore to normal position the 9 pms in the denomlnatlon 111 which any numeral key from l to 9may be actuated.V

neously the dial wheels 69, amounts lirropor-v tional to the digital valu-e of ins 55.

When subtraction is bei-ng performed in any of the totalizers,'it is advantageous .with the construction herein shown to rotate the Wheel of loWest'denorninationI/one 'additional digit distance in accordance with the hereinmentioned method of subtraction.

thel depressed For this purpose, there is associatediaith` each totalfizer a supplementary bar '15?? (Figs. 1 and mounted in a manner simi"- lar to, and parallel with, the rack bars 54, and having a lever 158 pivoted thereto, the rear end of which is adapted to be depressed by the bail -142 at the release of the subtraction bar 132, so that a projection 159- is moved `into the path of the generalfoperator cross-bar 72. At' the forward stroke of the genera-l operator its cross-bar Willengage the depressed projection 159 and move forwardly therewith the supplementary bar 157, so that an extension 160 thereon will eng e any of the depressed pins/55 on the units ar eto more said bar forwardly, said extension 160 being so placed in advance of the cross-bar T2'thait said units rack har 54 will be moved forwardly an additional digit distance when the pins thereon are engaged b v said projection 160. During addition. however, said projection 160 waits and moves forward with its front edge on, or par with. the front edge of the cross-bar 72, there being provided a recess 161 formed on the general operator cross-bar 72 into which said projection 1G() Will slide when the projection 159 of the lever 158 is in its normal ineffective position. It will be noted that the supplementary bar herein-described is similar in construction and action to that shown in the pending application of John N. Thornton, Serial No. 769,132. tiled May 22, 1913.

In the machine, as hcrein-disclosed, it is advantageous to automatically set the various computing members to subtraction as the work-sheet enters a computing zone in which one or lnorc of the totalizers are performing subtraction.

For this purpose, each dog 44 may be provided with a subtraction tappet 155 similar in construction to the denominational selecting tappets 45 (Figs. 1, 2 and 12), and

adapted` to -en'gage a subtraction bail 166 (Figs. 13 and '14), extending throughout the entire length of 'travel vof the tappet 155 throughA a computing zone and mounted on a swinging frame'167 having an extension 168 which overlies aflink 169 (Figs. 1 and 6), connected at its owerend to an arm 170 of a bell crank lever also pivoted at97, and having'an upright. arm5171 which, is connected to a Qslida-bly-mountedlatch '172, the free end of which underlies an arm 173(Fi 6, 7 and-8);V loosely mounted ony the rock shaft 102 and constantly drawn'to swing in clockwise fdirection as seen in Fig. 8 by la spring 174, but normally held against'said clockwiserot'ation by the latch 172 in a manner illustrate`d and more fully described in said application'of John' N. Thornton, Serial No. 769,132,131@ May 22, 1913.

ItA will be seenthat as the typewriter carriage 36v and tappet"155 connected thereto eiiters'ra{computing-,zone in which, it is desired toperform subtractionthat the tappet 155 will engagethebai'l 166 in advance of the engagement ofthe -associated tappet' 45 with the jack 46 of highest denomination, to rock the rearend 168 of the swinging frame 167 downwardly -to depress the link 169 and arm 170, andl thereb move the latch 172 rightu'ardly, as seen inFigs. 6 and 8, from underneath the free endA of the arm 173, so that the latter will be swung in clockwise direction, and a projection 175 on said arm willl be brought into engagement with a projection 176 fast on the hub 128, to swing the latter andthe', connected pawl 130 in clockwise direction by the power of the spring 174, which is suiliciently in excess of the powerrof the spring 129, to overcome the latter and thus move said pavvl 130 out of the notch 131 (Fig. 1) 'ofthe subtraction bar 132130 release said bar,'and thereby set the associated mechanism to subtraction position in the same manner as when said bar 132 is released manually at the depression of the key 126, as hereinbefore-described.

In order to restore the pin-setting linkage mechanism 57 and subtraction bar 132 to normal adding position, so that addition may be subsequently performed on the totalizer, mechanism is provided as will be presently described. To restore said bar 132 to normal position the arm 173 has a cam 177 formed at the forward end thereof which is moved into thepath ci the general operator cross-bar 72 (Figs. 7 and 8)when said arm is swung to subtraction position. During the initial part of the forward stroke of the general operator in a subtraction computation, its cross-bar 72 will be moved into engagement with the cam 177 to swing the arm 173 in counter-clockwise direction, so that the rear end thereof will be moved out of the path of the leftward movement of the latch 172, as seen in Figs. 6 and 8,'so that the latter may be returned toiits normal position by its spring 178(Fig.'1), and thereby release the pawl A13O'so that its end may subtraction bar 132, and moves 'said `sub-y traction bar forwardly against the ltension of its spring 133 to its normal ineffective position, so that its notch 131 will be moved into engaging relation with the pawl"13 0, at which time said pawl will snap up into said notch to hold the subtraction-bar1132 in its forward normal position VVwhen 'the general operator recedes. vv It will befrri'oted 'in passing that simultaneously with the.l return to Inormal of the arm 173,the arm 100-ofithefmtor-'clutch trip mechanism is alsoreturn'edftononnal position by a camI 185 '(Fig.i8)",flformed on the generali operator framework 79 and adapted to engage -and swing in clockwise direction an extension: frihedron Vthe arm 104 to rock the "shaft"Iv 102 therewith and through the intermediary'off thel pin-andslot connection 101 rock the'am 1100 against the tension of its spring '103, so that the rear end thereof will be moved out ofthe path of 'the latch 99, so that vsaid latch may be moved leftwardly by its spring 186, as seen in Figs. 6 and 8, tooverlle the rear end of the arm 100 and hold said arm and connected parts in a normal ineffective position. 1

Heretofore, in machinesof the character herein-described, it has been customary to place each dog 44a-on thje typewriter carriage in such position'relative to the denominational selecting 4jacks and to the work-sheet form to be typlewritten upon, so that computation will ta e place correctly in the various registers corresponding to the requirements of the particular variety of the work performed on Said work-sheet. This setting of the dogs is usually done manually and causes much labor and great time consumption when a variety of worksheet forms are to be used in' sequence and with frequency, the operative being compelled at each change of form of Worksheet to remove one or more of the demoninational selecting dogs from their previous position and more them to a position corresponding to the type of computation required in the various columns of the next work-sheet and to the letter-space positions of said columns or computing zones on said work-sheet.

I have found it advantageous to provide a plurality of denominational dogs 44 so placed relatively to the letter-space positions along the typewriterI carriage as to correspond to the letter-space positions of the various computing zones on a great num- 'lili ber olfV work-sheet forms when positioned along the writing line of the platen 35, by means of an adjustable paper-gage 200 1, 21, 22 and 23), provided for the purpose.

In order thatonly those of the tappets 45, 155-, corresponding to the Workfsheet pla/ced on the machine, may be effective, there is provided mechanism settable to render all of the other `-denominational selectors, in-

eifective. i

For this purpose, ,there are provided two relatively supenposed platesV or bars 201, 202 adapted to travel. in `unison in. letter-feeding direction with the typewriter carriage 36, and havin common perforations'203y formed therein t Band 21'), thiough which lnay'lextendf-th ,tappets `which it is desiredishould be in effective `position correspondingtog the -work-sheet on -the machine, the others of theftappets 415, 155 being held in ineffective. position, asseenin F-igs. 6, 21, 22 and 23;;,each dogffi may be4 provided with a numbenof the tappets 45 to allow for dierentfcombinations.: Bars 2 0-1 and 202 have something of' the action of astencil and, in vieur of .their resemblance to the perfol-'ated jacquar mag' properly be calledr jacquard stencils.

i s hereinfdisclosed, Vthe denominational selectionfcentfpollingplates 201 and 202 are formed tti-correspond toy work-sheets illustratedas Form f1, jForrn 2 and-Form 3, shown lin. 21, 15 and 16, respectively, but it will be understood that the plates 201 and- .202 may have the perforations 203 placed thereon in any desirable position and combined to conform to a very great variety of 'work-sheets iand computations, and to cooperate with anv number of totalizers.

As seen in Fig. 21, themachine is set to perorm ,computations corresponding to the requirements of Form 1, which setting may be maintained so long as the Worksheets 204 constituting Form 1, or worksheets similar thereto, are used in the machine. When, however, it is desired to set the machine to perform computations corresponding to the requirements of Worksheets 205, constituting Form 2 (Fig. 15), the corresponding tappets 45, 155, are moved to effective position and those of the tappets which had previously been in effective position and are not required to perform denominational selecting or subtraction setting, are moved to ineffective position.

For this purpose, the plates 201, 202 are adapted to slide relatively to each other to move to ineffective position all of the tappets on all of the denominational-selecting dogs 44, and are also adapted to move relatively to the typewriter carriage, and be locked thereto in any position in accordance with a scale formed on the plate 201, copd cardsY used in Weaving,-

erating with an index 206 tast on the typewriter carri-age framework 36. Said scale has marked thereon (Figs. 21, 22, 23) the numerals 1, L2, and 3, which Awhen moved opposite the index 206 will set the denominational-,selectingmechanism to correspond to Form l, Form 2, or Form 3, respectively. `.It Will benoted, by referenceto Fig, 21that said scale numerals 1, 2, and 3 have marked directly above them the numerals 15, 0, and 4 respectively, to indicate the position to which the gage 200sh-all be placed, so that the work-sheets rtra-yfbey placed in the machine with their computing zone; in juxtaposition with the denominational-selecting dogs. For this purpose the gage.v 200 is provided with an index 20K `coijpeeating; with a scale 20S formed on the paper table of the typewriter carriage. 36,. the ga e200 being provided VWilt-,lie handle209 Figs. 1 and 21), tor the purpose ofimanualiy shifting said gage Vto theppsition .indicated by the index 206. Lt will also be noted. that the scale formed/on the plate, 201 has the Word Off placed thereon,- Which, when moved opposite the index 206, will movethe denominationalselectoncontrolling.,plates 201 202, into a position to render all ofthe tappets. 45,155 i11ei`ective,tl1us neutralizing all of the totalizers of the machine.

ln order .that the `plate, 202 may be moved ieftwardlh relatively to'` the plat-e 201, to depress the tappets-45, 155 belovs1 the level of said plates, so thatllle latter may be moved relatively to the typewriter carriage 36, the plato 202 is provided with a finger-piece 210 which. when `moved-toward an adjacent (niger-piece 2.11 fast on. the plate 201, against the tension of a pring 212, from the Fig. 21 position to the ig 11 position, will move the slide 202V therewith, the latter being guided by slots 213 formed at both ends of said plate and engaging collars 214- fast on the brackets 215, 216. The slots 213 are formed so that the plate 202 will be moved leftwardduring the initial part of its stroke and will lbe moved both leftvvard and forward during the latter part of said stroke, so that the apertures 203 formed in the plate 202 will bei moved letward out of coincidence with corresponding apertures in the plate 201, and will also be moved forward out of coincidence with the latter. During,r said .leftward stroke of the plate 202, the edges of its apertures 203 will engage all of the upstanding tappets 45, 155 to swing the latter abouttheir pivots 217 against the tension of their springs 218 from the Fig. 3 position to the Fig. 4 position, so that the plates 20.1 and 202 may be moved in unison relatively tor the typewriter carriage 36, rightwardly or leftwardly, without causing any interferencewith the tap ts 45, 155, the said plates being unlocked rom the typewriter carriage at the time, as will presently be described.

It will be noted by reference to Fig'. 11 that as the apertures 203 formed in the plate 202 are 'moved leftwardly out of register with the apertures in the plate 201 that the former are moved to a position relatiye to the tappets 45, 155, so that the rear edge of said apertureswill be moved forwardly beyond the reach of the tappets, so that when said plates move in unison, the free ends of the tappets will not come into engagement with any of the apertures 203 formed in the plate 202, thus avoiding collision between said tappets and the edges of said apertures.

It will be noted by reference to Figs. 21, 22 and 23 that some of the apertures 203 are double th`e Width from front to rear, so as to permit two of the tappets to protrude therethrough. With r'such double-width apertures, ,the leftward and forward movement of plate 202 will carry apertures 203 to the left to depress both of the tappets normally protruding therethrough and also forwardly beyond the reach of the rearward tappet but not beyond that of the forward of the two tappets. In order to prevent collision between the forward one of said tappets and the left edge of said double width aperture during the rightward movement of the plates 201, 202, there is formed on said double Width apertures a cam surface 219 which, when moved into engagement with any of the tappets 45, will cam said tappets down against the tension of the springs 21S, and thereby permit said plates to be moved further rightward.

It will be noted in passiiw that the upper plate 201 is fixed to the brackets 215 by means of screws 220, which also serve to hold the guiding collars 214 which cooperate with the slots 213, said collars 214 being of a somewhat greater height than the thickness of the plate 202,50 that said plate may be easily slid leftward or rightward relatively to the plate 201 by the finger-piece 210 or spring 212, respectively.

In order that the denominational selectorcontrolling plates 201,202, may move in unison with the carriage 36, the brackets 215 are slidably mounted on the bar 48 (Figs. 12, 17, 19 and 20), and have projections 221 formed on their underside at the rear of the rack bar 49 to guide and hold the latch 223. Pivoted at 222 to the left-hand bracket 215 is the latch 223, (Figs. 17 and 20), the lower end of `which is normally in engagement with one of the notches formed in the bar 49 and held therein by a compression spring 224, one end of which is fast in a depression 225 formed in the bracket 215, and the free end of which bears against the upper end of the latch 223. During the latter part of the leftward movement of the plat@ 202, when Said plate is simultaneously moved forwardly, said forward movement causesan aperture 226 formed in said plate to be novell into engagement with a cam surface 227 formed at the upper end of the latch 223, to swing said latch in counter-clockwise direction from the Fig. 17 position to the Fig. 20 position, to move the lower end there-of out of engagement and clear ofany of the notches formed in the bar 49, so as t0 unlock said bracket 215 and disconnect the parts from the typewriter carriage, at which time the plates 201, 202 and connected parts may be moved in unison, .relatively to the typewriter carriage, so that. a mark on the scale formed on the plate 201 may be brought opposite the index 206, for the purposehereinbefore-mentioned.

When the plates 201, 202 have been thus positioned, manual pressure on the'ngerpieces 210, 211 maybe released, at .which time the plate 202 will be moved rightwardly by the .powerof the spring 212'until the left ends of the slots 213 will bemoved into engagement with their respective ,collars 214,V at which time the aperture 226 will have been returned Yto'normal position, and therewith the latch 223 bythe power 'of its spring 224, so` that the lower `end thereof will engage a notch in the bar 49, said latch being sofplaced relatively tothe scale formed on 'theplate 201 as to.' be directly opposite one of the. notches o'rmedfon the bar 49 when amark on said'scale is directly opposite the indexY 206. The-lower end of said latch 2,23ma`y Ybe cam-sha ed .as ,100 at 228 (Fig. 18),'so1as to .facilitate tlie-positioning of the plates 201, 202, and `the locking thereof to the typewriter carriage. li'hen the plates 201, 202 have thus been positioned and locked to the typewriter car- '105 ringe, the apertures 203 formed on'the ,ref spective plates will have been movedinto register with each other'and thusfall the tappets 45, 155, directly underlying'those of the superposed apertures 203, will be swung to effective Aposition by theirsprings 218 into engaging relation with the denom1- national jacks 46, so thatcomputation may he performed of a type corresponding to the setting of said plates 201,:202.

The effectiveness ofthe denominational sclecti ng mechanism, and thus of the -computing mechanism, is controlled by a roller 245 which normally tends to raise thedogs 44 anfl the tappets thereon into engaging relation with the jack Cams 50. The roller 245 extends clear across the machine and cooperates ivith conical rollers 246, journaled, one on each dog 411. A key 247 is provided to throw the roller 245 out of cooperative relation with the rollers 246, thereby permittinp the dogs to swing downward about thc rod 48 to take the tappets 45 out of engaging,lr relation with the tappet cams 50. Connection from the key 247 to the roller spectively wherein ,204,1 asheet of a loosele'af: sales; ook.;205l asheetof" voucher regisser 'and 255 a sheqqf riesiger.' J

` "-'It'vill he seen by4 reference t'o Fig. 21' that thejjack'headsl'( and denominational selecting dogs 4(1,a're'placegl iniclose proximity to each: otlierrom'right-todetg, and that sonic of the tappets "15,"wh'ich' protrude through the. perforations'in the plates" 201 and 202, pass'bfenenthsome of t e jacks associated within' totalizer in Awhich Ait is desired to 'rromputeysihlultaneously with the passing O' :somefof thefjtappets beneathn setrof jacks associated with'latotalizer in which it is desired nottp compute. In order'that' only those of 'thetotalizers in whichit is desired to compute may be actuated at a time, and in order to avoid the construction of a, machine of too great a Width, from left to right, each dog isprovided with five tappcts 45 Vextending; from front rear (Figs.

Y Each tappet travels in a vertica,l 'p1ane extending from right to left of the machine, to coperate-with differently positioned cs xns .o,n thejacks 46 for the .diflg'e'rent'Y computing units,V 4The tappets in the rezirmost planeengage theja-ck cams 50,1 94, and,-cope'ratel with totalizer No. 1; the tuppcts in the next rearmostplane coperatc with 'the cams 50 of totalizer No. 2, and so on to the foremost plane, thev tappets in which will coperate Vwith totalizer No. 5. fIt willbe seen by reference to Figs. 21, 22 'and thatthe jack cams associated with the 'totalizers' No. A6 andv No. '7, cooperate with the ta ets inthe rearmost planeand the plane-la )acent thereto, respectively, but this y'does not vitiate the action of the machine, since the dogs located at the right end of the typewriter carriage never enter the der iomina'tional lselecting zones 'of totalizers No.' 1' 4and No.A 2, since the carriage of the usual typewriterdoes not travel a distance's'o thtthe'extreme right end of its carriage willfnioveover the extreme left end of thefftypewriter framework, -which it `would havetodo'in order to move the tappets 45;"whi'ch, normally cooperate wit-h 'tolta-li'ersloi, BandNQ.v 7, Iinto 4the denominationhseleetig zones-of tlietotalizers No. 1 apd'No'fe'. 'fpfgiglnlwillfegaqted-,1byreferene nq Figs; 2 'ari 21,tliril'each-dbgfr44 "is provided with :1 subtraction 'j tppefll'l; placed forwardly of; the foremost'denominati'on, selecting tuppet 45, andfi'sfadapted, 'as he'reinlefore desrrilied, ttf"=1c{Llf|.tej `the bail* lGGKWit-h, which the subtriictionsetting nieclmn'isin4 roperates when a5"'sulpt-ra'cltiori-- Zone on the work-sheet is Iiioyed-"tplthefprinting point, as will presently'- be'fde'sciibed, there"b'eing Aapertures '-:Eorhi'e'din theplates 201A, 202, wl1ich, when fmoverd'- over said tappet 155, will allow said tappe't to, he'moved into effective position 'y-'its spring.

With the above arrangement of tnppcts 'nd jacks, any. type of computation muy be performed in any number of registers in the capacity ofthe machine, when numbers areA printed in any of the computing '/.ores ein iiork-,sheet, depending upon the :1 r 'rangement'.of the pcrforations Q03, formed in the plates 201,202, relative to the tipp-cls. Asshoirn in Figs.A 21, 22 and 23, tho por forations 203are arranged to correspond teo work-sheets 204, V205 and 255.

When 'worlrfsheet 204 Form 1, is plate-l in theinachine (Figs. 21 :11nd 2i), :1nd the computingY column headed Amount under Debitf7 55. is brought to the printing point, said l-form 1? being a shectof a sales-book, it is advantageous, when printing in said columnunder'saidheadinglto perform addition in registerslo. l4 and No. T, for a pnrpose presently toappear. 'To do this, the plates 201 andn202 are` moved until the numeralflf thereonappears opposite the index 206',` so that thev tappet 2 60 on the extreme left-hand dogv 14 4Will vprotrnde through :in eperturel and. (will, coperate with the 'clams 50 ofregister No., 1 thus indexing :id- 4ditiyelyI upon,the computincr mechanism as- 'sociatedwith said register QNO. 1 any num bei printedin column 1, which in the present example is an item of 1,200.00 dollars, indicating the amount of the item in line with saidnumberunder thel'heading Description. Simultaneously with the Writing of said 1,200.00 dollars and indexing thereof'on register`No.` 1, a tappet `262, protruding through an aperture 263, will actuate the ijacks 46 associated With-'register No. 7,to index'therein said 1,200.00 dollars, so that at the forward stroke'of the general operator, there will 'appear-on the dial Wheels 'of the totalizer's No. 1 andi No. 7, the number 1,200.00.'y f f ,y

In Writing the y nextvnumber, which is 1,200.00 dollars in column 3 headed Arnachine sales,fit is advantageous to indexv said numberA additivelyin registers No. 2` and N095. Frthispurpose, there are provided tappets 264, '-265,2'extending through apertures 266, 267,'{ada'pted to engage the -denominational jacksassociated with the registers No. 2-and No. 5, respectively, when'said column 3A is'broughftort e Writing point, yso that after said 1,200.00 dollaisis Written 1n said column and the general 'operator is `reciprocated,A there Willa pear on^ea`rh of the totalizers',` No. 2 and o." 5, the vnumber 1,Q00 00.3'l 'fL "i "t: The 'nextnumber' Written on the Worksheet is l1,000.00 ldollars, in 'line 'Withnthe item B machine in columnfl, directly-beneaththeprevious numberwritten in'l said column,'andisf'likewise added iii-'registers 1 and 7, so thatffon the dial` Wheels of each of the totalizers thereof will appear vthe number-'2,200.00 dollars. ff i Written in line with the last amount is the same amount, namely, 1,000.00 dollars, in `column 4, which-is headed B mafjhines, and it `will be advantageousl'to add said 'amount in registers No.2 and ,'No. 4. For this purpose, there are providedlta'ppets '268, 269, extending through apertures 270, 271, respectively, --saidi tappets being adapted, when the-fourth f-olumn is brought to the writing point, to engage the jacks associated with registers No. 2 Aand No. 4, respecf tively, so as to exhibit on thei'respective totalizersthe amount ,fo"1,000.00 dollars at the reciprocation ofthe general operator after said number had=been Writtenfin 'said column and indexed on said registers.

The next amount 25.00 dollars, is Written in column 1 in line with the item Set tools andisaddcd in registers No. 1 and No. 7 vin a manner as previously described, by the coiperation of the tappets 260, 262, with the jacks of theF associated registers, so that the dial Wheelsof said registers will 'exhibit the number` 2,225.00 dollars at the 'end of said computation 'in column 1. The amountsthusfar having been `copied onto Form 1" frompurchasers orders, salesmans reports or 'the like.

' `The'next amount is preferably' written in p, l; v.

column 2, headed Accounts receivable, and may be Written in line with the last amount in column 1, namely, 25.00 dollars. The amount in said column 2 'is Written to agree with theinumber exhibited on tota'lizer N o. 1,. namely, 2225.00 dollars, and is advantageously subtractivel y indexed on the mechanism associated withregister No. 1. For this purpose, rthere isprovided a tappet 272 extendingthrough an aperture 273 and adapted to engage the rjacks associated with register o.l 1 when said column 2 is brought to the writing point` Before the .tappet 272 engages any of the ljacks`46, its associated subtraction-setting-l :tappet 155, extending through an aperture 274, will actuate .the subtractionl bail 166 associated with said 'register to set the indexingfmechanism there` of, so as to index any numberwritten in said 'column 2 in accordance with'fthe herein-described method` ofnsubtractionwl It will be 'seen thatafterthe reciprocationf thefgeneral operator andV following tha-Writing of said amount in column 2, that the'dial wheels of register ."1"Will be actuated: subtractively and-Will be returned to zero, provided that reading thereon 'had been copied correctly when writin'ginc'olumn 2. Ini'case register No. 1 does not exhibit zeroA aftersaid amount has been written-win lcolumn-'2, the operative iswarned :thereby that an error 'has 'been made-in the-computation or in copying, and is thereby enabled to correct said error be'- fore proceeding 'with following computations. f if v1 Y A Written in line' Withthe last two amounts in columns 1 and 2 (Fig. 21)is the number 25.00 dollars in column 5 under heading Amount under Sundry salles. It is advantageous when writing in' said column 5 to additively index said amount in registers No. 2 and No. 3, for which purpose there is provided on one of the dogs 44 a tappet 2,75 `(Fig. 21), extending-through an aperture 276, and a tappct 277 extendingthrough an aperture 271, and Whichare so placed relatively to the typewriter carriage and column 5 that when said column is brought to the writing point, the tappets 275and'277 will 'engage respectively the cams 50 formed on the jacks associated with registers No. 2 and No. 3 soas to run said amount into the re spective totalizers, and thereby cause the reading on totalizer No. 2 to be 2225.00 dollars and the reading on totaliwer No. 3 to be 25.00 dollars. The Wri ting of this last amount completes the Work on said Form 1, or sales-book sheet 204, as illustrated in the present example, but other or additional amounts may bc Written on said Form 1 to exhibit on `the totalizers a reading corresponding to the entries thereon.

twill he seenfrom the foregoing and by reference to Figs. 21 and 24 that totalizer No. 1 will exhibit the total of each invoice after all the amounts are entered in column 1 and is returned to read 0 after said total exhibited thereon has been Written in column 2, so that totalizer No. 1 Will be ready to exhibit the total of all amounts written in column 1 of the next invoice, either on the same sheet# or another Worksheet 204. It will also be seen that totalizer No. 2 at the completion of the writing of each invoice will exhibit all the invoice entries as distributed, whereby the operative can determine the correctness ofl his entries in columns 3, 4 and 5, 21). by comparing the reading ot totalizer 2W-ith that of totalizer 7 which agree in this example (Form 1). It will also' be seen 'that totalizer 3 will exhibit the total of all Sundry salesg that totaliaery 4 willexhibit the total of all B machines salesf and that-totalizer 7 will exhibit the-.total of alli invoices (column 1) entered onall the work-sheets 204, as distin ushedi fromA Yinvoices distributed over ie various columns `of. said worlnsheets (columns 3', 4;r and 5), as exhibited on totalizer 2. The readin'g' of totalizers 2 and 7 should alwaysagree to prove that-the entries on work-sheets '204- have been correctly made. i

It will be noted in passing that any' reg'- ister maybe caused to either'add orsubtract, or add and subtract-When the machine is set to computet when writing on any one of the various Worklsheets, and for purposes corresponding to the results required when computin on 4said Work-sheets, and to coperate with t ie other registerso the machine in a manner corresponding to the various forms o computation'required when writing on said worlrlsheets. Y

When it is-desired to com ute in connection witlrwork-sheet 205' orm 2 (Fi s. 15 and 22), the operative, vafter moving t e slides 201, 202 relatively' to each'` other by the handles 210, 211, movessaid slides in unison until the numeral 2 on the scale thereon is opposite the index 206...At4 the release of the finger-piece 210 the respective apertures 203 formed in said' slides are moved into register with each other, so that such tappets 45 will project therethrough which correspond to the arrangement required for computing in the proper totalizers when writing amounts on-Form 2.

lt will be seen by referenceto-Fig. 22 that coneomitantly with the indicating of the numeral 2 formed on the Vplate scales, numeral 0 is also indicated bythe index 20G. The paper gage 200 is then moved so rthat its index 207i will indicate-the corresponding numeral0 on its associated scale.

It will be seen by reference'to Figs. 15, 22 and 24 that when columnfl hea'ded Accounts payable isbroughtftoA thev Writing point and the amount 125.00 dollars isvvritteny on the lirstline in said column, said amount will be added in register, so that the totalizer thereof will exhibit the number 125.00 dollars', there being: provided' for the purpose the tappet 262 projecting through an aperture 278 placed adjacent to the right ofand in thesa'me vertical plane as the aperture 203, so that said tappet- 262 may index numbers in register 7 when' writing in column 1 on Forrm 2? inthe 'same manner as when-Writing numbers incolumn 1 on- Form 1, but forithe purposeo exhibiting the total of all vouchers as issued instead of invoice totals. A

The next-item entered on the Voucher re ister is 55.00 dollars :in column 2 headed factory. Itis advantageous fwhen Writing in saidcolumn 2 to' performaddition in registers 1- and 6 for purposes presently to appear. To index said amount additiymcl-y in said registers 1 and `6,. there is provided (Fig. 22)- the-tappet 27 2` extending through an aperture 279 andl a tappet 280 extending through an aperture 281 which when column2 on' Form 2? is brought to the writ-f ing poing-Will respectively engagethejack cams 50, 94 associated' with-each of theregisters 1 and 6, so as to cause the amount 55.00 dollars to appear onthe respective totalizfers of said registers. 95

The next amount 70.00 dollars is entered in column 3 headedB- factory and: in line with the last amountnamely, 55.00 dollars, and is advantageously added in registers 1 and 5. For this purpose, there is provided 10o a tappet 282 projecting through an-aperture 283 and the tappet 265 projecting through'an aperture-284, so placed on the typewriter carriage that when column 3 is brought to the Writing point and the number' 70.00 dol- 105 lars written therein, said amount will be additively indexed in the registers 1 and 5, so as to cause the totalizers thereof,at the actuation of the general operator, to exhibit the amounts 125.00 dollars and -7 0.00 dollars, 1m respectively.

The next amount, 50.00 dollars, is written in column 1 directly below the previouslywritten amount, namely, 125.00 dollars, and is added in totalizer 7 in the same'manner 11S as said previous amount in column 1, to cause said totalizer to exhibit the amount, 175.00 dollars.

ln line with said last amount and in column 4; headed' Sundry Mdse. is again 120 written Said amount, 50.00 dollars, but when Written in said-column l1- is added in registers 1 and 4, there being providedor the purpose a tappet 285fextending through an aperture 286 and the tappet 269 extending 125 through an aperture 287,'said tappets being so placed-as to actuate the jacks associated with registers 1 and 4 when the amount, 50.00 dollars, is being Written'- in said column. Afterthe* Writing and indexingiof 1.30 

